7 SH2 *sh2; // active sh2
9 int sh2_init(SH2 *sh2, int is_slave)
13 memset(sh2, 0, sizeof(*sh2));
14 sh2->is_slave = is_slave;
16 ret = sh2_drc_init(sh2);
21 void sh2_finish(SH2 *sh2)
28 void sh2_reset(SH2 *sh2)
30 sh2->pc = p32x_sh2_read32(0, sh2);
31 sh2->r[15] = p32x_sh2_read32(4, sh2);
34 sh2->pending_int_irq = 0;
37 void sh2_do_irq(SH2 *sh2, int level, int vector)
39 sh2->irq_callback(sh2->is_slave, level);
42 p32x_sh2_write32(sh2->r[15], sh2->sr, sh2); /* push SR onto stack */
44 p32x_sh2_write32(sh2->r[15], sh2->pc, sh2); /* push PC onto stack */
46 /* set I flags in SR */
47 sh2->sr = (sh2->sr & ~I) | (level << 4);
50 sh2->pc = p32x_sh2_read32(sh2->vbr + vector * 4, sh2);
52 /* 13 cycles at best */
53 sh2->cycles_done += 13;
57 void sh2_irl_irq(SH2 *sh2, int level)
59 sh2->pending_irl = level;
60 if (level > sh2->pending_int_irq)
61 sh2->pending_level = level;
63 sh2->pending_level = sh2->pending_int_irq;
68 void sh2_internal_irq(SH2 *sh2, int level, int vector)
70 // FIXME: multiple internal irqs not handled..
71 // assuming internal irqs never clear until accepted
72 sh2->pending_int_irq = level;
73 sh2->pending_int_vector = vector;
74 if (level > sh2->pending_level)
75 sh2->pending_level = level;